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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceDiagram basedEasyData or graph

JEE Main 31 August 2021, Shift 1, Chemistry Q31

Question 31 of 90 in this shift, Chemistry question 1 of 30, Section A.

Which one of the following is the correct PV vs P plot at constant temperature for an ideal gas ? (P and V stand for pressure and volume of the gas respectively)

The figure, in words

Four graphs of PV (vertical) vs P (horizontal), each with L-shaped axes; options are the plotted lines/curves only.
  1. (1)[figure: graph, vertical axis PV, horizontal axis P; a straight line rising from the origin]
  2. (2)[figure: graph, vertical axis PV, horizontal axis P; a straight line starting on the PV axis above the origin and sloping downward]
  3. (3)[figure: graph, vertical axis PV, horizontal axis P; a curve starting high near the PV axis and falling, flattening out to the right]
  4. (4)[figure: graph, vertical axis PV, horizontal axis P; a horizontal straight line parallel to the P axis]Official answer

Official answer

Option 4

NTA final key.

Chapter
States of Matter
Topic
Ideal Gas Laws
Idea tested
Graphical Analysis of Boyle's Law

Same topic in other shifts

All Ideal Gas Laws questions
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  2. 6 Apr 2026, Shift 1 · Q35Two closed vessels of same volume are joined through a narrow tube and both vessels are filled with air of pressure 90 kPa and temperature…MediumSingle correct
  3. 3 Apr 2025, Shift 2 · Q34Pressure of an ideal gas, contained in a closed vessel, is increased by 0.4% when heated by 1∘1^\circC. Its initial temperature must be:MediumSingle correct
  4. 4 Apr 2025, Shift 2 · Q45There are two vessels filled with an ideal gas where volume of one is double the volume of other. The large vessel contains the gas at 8…MediumSingle correct
  5. 7 Apr 2025, Shift 1 · Q51At the sea level, the dry air mass percentage composition is given as nitrogen gas: 70.0, oxygen gas: 27.0 and argon gas: 3.0. If total…MediumSingle correct
  6. 8 Apr 2023, Shift 1 · Q81[figure: three bulbs joined by pipes with stopcocks] Three bulbs are filled with CH4\mathrm{CH_4}, CO2\mathrm{CO_2} and Ne as shown in the…MediumNumerical valueHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.